ext: Added extent tree building logic.

PiperOrigin-RevId: 259628657

1 files changed, 23 insertions, 0 deletions

diff --git a/pkg/sentry/fs/ext/dentry.go b/pkg/sentry/fs/ext/dentry.go
new file mode 100644
index 000000000..71cd217df
--- /dev/null
+++ b/pkg/sentry/fs/ext/dentry.go
@@ -0,0 +1,23 @@
+// Copyright 2019 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package ext
+
+// dentry implements vfs.DentryImpl.
+type dentry struct {
+	// inode is the inode represented by this dentry. Multiple Dentries may
+	// share a single non-directory Inode (with hard links). inode is
+	// immutable.
+	inode *inode
+}